Caution Light Illuminated After Changing Tubes

[DHL]

My rectifier tube blew a few days ago so I picked up a couple of replacements today. I also picked up a couple sets of GT EL34's (Red 8) and replaced all the tubes when I returned home.

Yes I did set the bias switch to EL34!

When I turned the power on to the amp, the red Caution light came on. All the tubes light up, and I also replaced the fuse, so I'm not sure what to do!

 

[mesa metal]

don't worry the red light is just an indicator light that tells you the amp is on EL34 mode"...
when I bought my mkV back in December it came with EL34s in it and when I turned it on
I was freaking out there was something wrong with the amp................not so

 

[DHL]

Thanks! I'm going to put them back into my amp right now (well, after the 6l6's cool down a bit) and give 'em a whirl!

 

[DHL]

One of my tubes already went up in smoke!

Back to the 6l6's for now.

 

[domct203]

Be careful, the class A positions run hot. What rating were the GT EL34's?

Did you check the bias? I have a quad of JJ E34L's that draw about 65% MPD in my Roadster & Stiletto (@ stock bias setting) but in my MV they go into 90+% MPD in the Class A sockets. They would red-plate for sure.

Dom